Photos: Free agent offensive tackles

The Texans’ protection of quarterbacks was questionable last season. Houston allowed quarterbacks Matt Schaub (21), Case Keenum (19) and T.J. Yates (2) to be sacked a combined 42 times, losing 370 yards. First-year Texans head coach Bill O’Brien has expressed his desire to address the vital position on the offensive line.

“We are looking at all the tackles,” O’Brien said at the combine. “The tackles on our team, the tackles in free agency, the tackles in the draft. That is a very important position on your football team.”

With the Texans in the market, take a look at 20 tackles that could be available when free agency begins March 11.